Civil · C-D3GMJ

Typical Trench Detail

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Elements

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A standard utility trench installation includes a drain pipe resting on prepared bedding at the bottom of the excavation. A tracer wire or warning tape is positioned six inches above the pipe within the trench backfill, which consists of crushed stone, gravel, or compacted native soil. Paved areas require a typical pavement section above the backfill, with five-sack slurry cement backfill specified when there is less than one foot of cover to subgrade. The trench width maintains a minimum pipe outside diameter plus twelve inches and a maximum of eighteen inches.

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